Space Book

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Welcome to Space Book!

Here you will find all kinds of information about general astronomy and telescopes. Space Book is organized like an astronomy textbook, with chapters, sections, sample questions and examples.

Some of the topics were designed as background reading for our educational programs, while others are included to provide a well-rounded view of the current knowledge and theories in astronomy, and how astronomers study the universe.



Finding Your Way Around the Sky
How do astronomers find their way around the night sky and measure sizes and distances in space?
The Nature of Light
Light is what astronomers use to learn about the nature of the Universe.
How Telescopes Work
Telescopes are the fundamental tool in observational astronomy.
The Solar System
Our Solar System consits of the Sun, four rocky planets, four gas giant planets, five dwarf planets, many moons, asteroids, comets and much more. Humans have sent spacecraft to orbit or land on many of these planets and moons, and have even set foot on Earth's moon. Studying our Solar System not only helps scientists learn about our surroundings, but also about how other planetary systems may form.
Life Cycle of Stars
There are billions and billions of stars in the universe and no two of them are exactly alike. They vary in composition, size, age, location, and in the planets that accompany them. This chapter describes the life cycle of stars and the H-R diagram. It also explains how distances to stars and other objects in the universe are measured.
Extrasolar planets, or exoplanets, are planets orbiting stars outside our solar system.
The Universe contains billions of galaxies, each with millions or billions of stars, like our Sun.
Cosmology is the study of the origin and evolution of the Universe.
Astrobiology seeks to answer basic questions about life in the Universe.
Magnitudes and Distance Measurement
How do astronomers compare objects in space, and how do they measure their distance?